SpringBoot 统计接口调用耗时的多种方式

在Spring Boot中，统计接口调用耗时的方法有多种，以下是几种常见的方法：

1. 使用AOP（Aspect-Oriented Programming）

Spring AOP可以让你在不修改现有代码的情况下，增加额外的行为，例如日志记录、性能监控等。

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Component;
 
@Aspect
@Component
public class PerformanceMonitoringAspect {
 
    @Around("execution(public * com.yourpackage..*Controller.*(..))")
    public Object profileAllMethods(ProceedingJoinPoint proceedingJoinPoint) throws Throwable {
        long start = System.currentTimeMillis();
        Object result = proceedingJoinPoint.proceed();
        System.out.println(proceedingJoinPoint.getSignature() + " took " + (System.currentTimeMillis() - start) + " ms");
        return result;
    }
}

2. 使用Spring Boot Actuator

Spring Boot Actuator模块可以帮助你监控和管理Spring Boot应用，包括接口的调用耗时。

首先，添加依赖：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>

然后，在application.properties中启用或者通过JVM参数启用。

management.endpoints.web.exposure.include=metrics

接下来，你可以通过/actuator/metrics/http.server.requests端点来查看请求的详细信息，包括耗时。

3. 使用Spring MVC的Interceptor

import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
@Component
public class PerformanceInterceptor implements HandlerInterceptor {
 
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        long start = System.currentTimeMillis();
        request.setAttribute("startTime", start);
        return true;
    }
 
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        long end = System.currentTimeMillis();
        long start = (Long) request.getAttribute("startTime");
        System.out.println(request.getRequestURI() + " took " + (end - start) + " ms");
    }
}

然后在Spring配置中注册这个Interceptor：

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.sp